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Steel rods are manufactured with a mean length of 22 centimeter cm Because of variability...

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Steel rods are manufactured with a mean length of 22 centimeter cm Because of variability in the manufacturing process the lengths of the rods are approximately normally distributed with a standard deviation of 0 07 cm Complete parts a to d RECID a What proportion of rods has a length less than 21 9 cm Round to four decimal places as needed

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